Whether PullToRefreshListView has it's extras enabled. This allows the user to be
able to scroll while refreshing, and behaves better. It acheives this by adding
Header and/or Footer Views to the ListView.

May be a reference to another resource, in the form "@[+][package:]type:name"
or to a theme attribute in the form "?[package:][type:]name".

description
Whether PullToRefreshListView has it's extras enabled. This allows the user to be
able to scroll while refreshing, and behaves better. It acheives this by adding
Header and/or Footer Views to the ListView.

May be a reference to another resource, in the form "@[+][package:]type:name"
or to a theme attribute in the form "?[package:][type:]name".